Question

Find the potential difference across the resistor if 125 J of heat is generated per second in a resistance of 5 Ω.​

Answer 1

Explanation:

Given :

• Heat energy (H) = 125 J
• Resistance (R) = 5 Ω.

To find :

• Potential difference (P)

Solution :

Know that:

• H = V²T/R
• V = IR

Where we have:

⟹ H = Heat energy

⟹ I = Electric current

⟹ R = Resistance

⟹ T = Time taken

⟹ V = Potential difference

Substituting the values:

⟶ 125 = V² × 1/5

⟶ V² = 125 × 5

⟶ V² = 625

⟶ V = √625

⟶ V = 25 V

• The potential difference across the resistor is 25 V.